In a newly released material arts film, the actress playing the lead role has a stunt double

who handles all of the physically dangerous action scenes. According to the script,

• the actress appears in 50% of the film's scenes, 

• her double appears in 30% of the film's scenes, 

• two of them are together 5% of the time.

Let L is the event "lead actress appears in scene" and D is the event "double appears in scene". Using set notation to express each of the following events concerning a given scene has:

(a) either the lead actress or the double or both; (b) the lead actress only;

(c) the stunt double only;

(d) neither the lead actress nor the double appear?